bauma 2007 - Mobility and safety are key concerns in special

Feb 01, 2007

The trend towards small, mobile, high-performance equipment for special applications in foundation work is continuing unabated, according to one system supplier. But this is by no means the only common denominator in pile-driving, pulling and drilling technology. Although the individual market segments utilise different techniques and processes, the catalogue of requirements is very similar when it comes to performance, noise reduction, user comfort and safety.

The 28th bauma, which takes place from 23 to 29 April 2007 in Munich, serves as a platform for exhibitors of machinery for special applications in foundation work. Here they can present all the facets of their segment. Visitors can expect to find further improvements in performance and overall standards as well as increased automation of functional processes, with the associated easier operation and monitoring. Many of the changes and improvements announced have an effect on all aspects of the machinery and equipment concerned. For example: The deeper the drilling with the conventional piling system with Kelly bars, the longer the telescopic drilling tools have to be. This then entails larger winches and also new solutions for the design of the masts. Higher drilling performance through more powerful engine and hydraulic units continues to be a key decision criterion in 2007. Closely tied with this is minimum input on maintenance and low emissions. Noise and vibrations arising from building operations are also key parameters, particularly as regards piling and pulling technology. Here close coordination is needed between machine and vibration technology. Vibrators with variable frequencies and amplitudes enable optimum adaptation to the ground conditions.

Manufacturers are well prepared for new building techniques and processes
A strong trend towards soil mixing methods is emerging in building techniques. Above all cutter soil mixing (CSM) for the creation of below-ground walls is now attracting a great deal of attention worldwide. In contrast to other techniques which are derived from rotary drilling, CSM uses milling wheels. These loosen up the ground and, as a result of their rotary action, they mix the added suspension into a soil-cement mortar. The process is suitable mainly for creating sheeted trenches or retention walls. Other uses are in road building, where cost-efficient subsoil preparation is an important part of the calculations. The manufacturers of drilling, piling and pulling equipment will not only be exhibiting new machinery at the 28th bauma, but also showcasing interesting advances in applications technology.

Time and cost benefits from horizontal drilling
Vertical drilling or milling is just one option. The manufacturers of horizontal drilling systems are emphasising their twenty or so years of experience in continuous improvements and innovations. Horizontal drilling equipment is a popular solution for applications such as trenchless laying of pipes or cables, in sewer construction, environmental construction projects and also in the building of drainage channels. Process-controlled horizontal drilling techniques are also used in the construction of horizontal wells, for irrigation systems and for keywells. Interesting savings can be achieved as a result of the time and cost benefits involved in using this technology. At the forthcoming bauma, new developments and innovations can be expected from the manufacturers of machinery and accessories.

Electronic systems take over complex operating processes
Telediagnosis, touchscreen displays and comprehensive data monitoring are now a standard feature of drilling, piling and pulling technology. But it´s not only the industrialised nations that are demanding the latest communications technology the emerging nations, too, are moving in this direction more and more. GPS plays a central role, when it comes to locating the machines or for rapid data transfer. The machine technology departments (MTAs) thus have permanent access to the operating data on such aspects as exact location, precise machine operating times, maintenance intervals and necessary safety tests. The drivers of the machines can also input additional data on the wear and tear of the machines or the tools, via a touchscreen display. In the industrialised countries the trend is clearly towards automation of all the stages in a process. A typical example here is the very complex continuous flight auger piling procedure where concrete is pumped whilst the auger is being withdrawn. The speed of withdrawal must be carefully controlled to avoid any cavities. Electronic systems come to the rescue here, as important processes can be taken over by the electronic control systems, thus facilitating the job of the operator. The manufacturers of tunnel construction equipment will also be showcasing interesting new solutions at bauma in Munich. For example integrative measuring systems which during the piling process deliver information, via sensors, on the exact borehole depth, angle of piling, hydraulic operating pressures and well fluid and suspension pressure. They also give information on the mechanical properties of the rock or soil being drilled.

Demands to reduce noise emissions are now gaining ground
Data-transfer is also becoming more and more important, according to one well-known supplier. Here the emphasis is not just on commercial considerations, but also on the ability to monitor the building site using technology. Questions such as 'Is the work being done to the proper standard?', and 'Are the products being used suitable?' are not only important in large-scale projects. Environmental aspects are also being given due attention. In terms of emissions the road forward is now clear, but we can expect to see considerable efforts, too, in the area of noise reduction. Many trends in construction machinery are now firmly connected with the Japanese market and there the whole subject of noise emissions has high priority.

Further information:
Henrike Burmeister, Press Officer, Capital Goods Fairs
Messe München GmbH
Tel. (+49 89) 949-20245
Fax (+49 89) 949-20249

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